#include"../common/etcd.hpp"
#include"../common/channel.hpp"
#include<gflags/gflags.h>
#include <thread>
#include "main.pb.h"

DEFINE_bool(run_mode, false, "程序的运行模式, fasle-调试; true-发布;");
DEFINE_string(log_file, "", "发布模式下, 用于指定日志的输出文件");
DEFINE_int32(log_level, 0, "发布模式下, 用于指定日志输出等级");  //trace default 0

DEFINE_string(etcd_host, "http://127.0.0.1:2379", "这是服务中心地址");
DEFINE_string(base_service, "/service", "服务监控根目录");
DEFINE_string(call_service, "/service/echo", "服务监控目录");

void online(const std::string &service_name, const std::string &service_host)
{
    LOG_DEBUG("上线服务, {}-{}", service_name, service_host);
}
void offline(const std::string &service_name, const std::string &service_host)
{
    LOG_DEBUG("下线服务, {}-{}", service_name, service_host);
}
  
int main(int argc, char* argv[])
{
    google::ParseCommandLineFlags(&argc, &argv, true);
    
    init_logger(FLAGS_run_mode, FLAGS_log_file, FLAGS_log_level);


    //1.先构造Rpc信道管理对象
    auto service_manager = std::make_shared<ServiceManager>();
    service_manager->declared(FLAGS_call_service);
    auto put_cb = std::bind(&ServiceManager::onServiceOnline, service_manager.get(), std::placeholders::_1, std::placeholders::_2);
    auto del_cb = std::bind(&ServiceManager::onServiceOffline, service_manager.get(), std::placeholders::_1, std::placeholders::_2);
    //2.构造服务发现对象
    Discovery::ptr dclient = std::make_shared<Discovery>(FLAGS_etcd_host, FLAGS_base_service, put_cb, del_cb);
    //4.发起EchoRpc调用
    while(1)
    {
        //3.通过Rpc信道管理对象 获取提供Echo服务器的信道
        auto channel = service_manager->choose(FLAGS_call_service);
        if (!channel)
        {
            std::this_thread::sleep_for(std::chrono::seconds(1));
            continue;
        }
        example::EchoService_Stub stub(channel.get());
        example::EchoRequest req;
        req.set_message("hello world");

        brpc::Controller *cntl = new brpc::Controller(); // 防止还没回调 上下文被释放 放堆上
        example::EchoResponse *rsp = new example::EchoResponse();
        stub.Echo(cntl, &req, rsp, nullptr); // 同步调用
        if (cntl->Failed())
        {
            std::cout << "rpc 调用失败" << cntl->ErrorText() << std::endl;
            delete cntl;
            delete rsp;
            std::this_thread::sleep_for(std::chrono::seconds(1));
            continue;
        }
        std::cout << "收到响应：" << rsp->message() << std::endl;
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    return 0;
}